linux-kernel - Re: [PATCH] move vm tools from Documentation/vm/ to tools/

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Date:	Thu, 02 Feb 2012 15:32:55 +0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Dave Young <hidave.darkstar@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Young <dyoung@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] move vm tools from Documentation/vm/ to tools/

On 02/02/2012 10:13 AM, Dave Young wrote:
> On Thu, Feb 2, 2012 at 5:17 AM, Andrew Morton<akpm@...ux-foundation.org>  wrote:
>> On Wed, 1 Feb 2012 14:34:20 +0800
>> Dave Young<dyoung@...hat.com>  wrote:
>>
>>> tools/ is the better place for vm tools which are used by many people.
>>> Moving them to tools also make them open to more users instead of hide in
>>> Documentation folder.
>>>
>>
>> It would be nice to covert these into simple pass/fail tests and
>> promote them to tools/testing/selftests/.
>
> Andrew, I'm not clear about this, do you means to selftest
> hugepage-mmap.c,  hugepage-shm.c  and map_hugetlb.c? I think slabinfo
> and page-types should stay in tools/vm/. Can you explain a bit?
>

Hey,

Check the comments in these files:

/*
  * hugepage-mmap:
  *
  * Example of using huge page memory in a user application using the mmap
  * system call.

/*
  * hugepage-shm:
  *
  * Example of using huge page memory in a user application using Sys V 
shared
  * memory system calls.  In this example the app is requesting 256MB of
  * memory that is backed by huge pages.  The application uses the flag
  * SHM_HUGETLB in the shmget system call to inform the kernel that it is
  * requesting huge pages.

/*
  * Example of using hugepage memory in a user application using the mmap
  * system call with MAP_HUGETLB flag.

All of them are examples, not tests, not tools, thus Documentation/ is 
the best place for them.
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